Aalto University Demonstrates World’s First Superconducting Quantum Heat Engine in Superconducting Circuits
Researchers at Aalto University have realized the world’s first experimental cyclic quantum heat engine operating inside a superconducting circuit. The engine uses a transmon qubit coupled to a quantum-circuit refrigerator to perform a full Otto cycle at millikelvin temperatures. Positive work is generated from quantum-scale heat flows, validating the concept in practical hardware. This development reduces dependence on external control lines and supports Finland’s goal of a 1,000-logical-qubit quantum computer by 2035. Results are published in Nature Communications.
July 13, 2026